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Stateless and Stateful Enterprise Java Beans
I am going through the Java EE 6 tutorial and I am trying to understand the difference between stateless and stateful session beans. If stateless session beans do not retain their state in between method calls, why is my program acting the way it is?
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Running a Haskell program on the Android OS
...ramework (added since android 2.3) or you must write JNI glue code between Java-C-Haskell, the former option is the easier solution and if I remember correctly might actually be backwards compatible with previous versions of Android below 2.3.
Once you have this you must build Haskell code as share...
What is a difference between
... I never really got the PECS explanation by Josh Block in effective Java. However @Yishai, this is a helpful way to remember. Perhaps we can propose a new mnemonic, SAGE: Super -> Add / Get -> Extend
– dcompiled
Sep 28 '14 at 21:15
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What is the 'instanceof' operator used for in Java?
...an object.
It returns a boolean value.
For example
package test;
import java.util.Date;
import java.util.Map;
import java.util.HashMap;
public class instanceoftest
{
public static void main(String args[])
{
Map m=new HashMap();
System.out.println("Returns a boolean value ...
How can I get the current stack trace in Java?
How do I get the current stack trace in Java, like how in .NET you can do Environment.StackTrace ?
21 Answers
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How to change the Eclipse default workspace?
... I do if want to change the root directory of eclipse (for file handing in java)?
– Dhruv Singhal
Aug 3 '18 at 13:59
add a comment
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Why are arrays covariant but generics are invariant?
From Effective Java by Joshua Bloch,
9 Answers
9
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About Java cloneable
I was looking for some tutorials explaining about Java Cloneable , but did not get any good links, and Stack Overflow is becoming more obvious choice anyways.
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Reading Properties file in Java
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my file hierarchy is: src -> myPackage -> myClass.java , myProp.properties. I did what you advised me but it still throws the same exception
– nikos
Nov 27 '11 at 13:03
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Does the Java &= operator apply & or &&?
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From the Java Language Specification - 15.26.2 Compound Assignment Operators.
A compound assignment expression of the form E1 op= E2 is equivalent to E1 = (T)((E1) op (E2)), where T is the type of E1, except that E1 is evaluated o...